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UPD4702G fiches techniques PDF

NEC - INCREMENTAL ENCODER 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS

Numéro de référence UPD4702G
Description INCREMENTAL ENCODER 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS
Fabricant NEC 
Logo NEC 





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UPD4702G fiche technique
DATA SHEET
MOS INTEGRATED CIRCUIT
µPD4702
INCREMENTAL ENCODER 8-BIT UP/DOWN COUNTER
CMOS INTEGRATED CIRCUITS
DESCRIPTION
The µPD4702 is 8-bit up/down counters for an incremental encoder. Two-phase (A, B) incremental input signals
are phase-differentiated, and on each signal edge, an up-count is executed if the A phase is leading, or a down-count
if the B phase is leading. Eight-bit count data is output in real time. A carry output and borrow output are also
provided for counter overflow and underflow.
The µPD4704 is also available; use of these enables the count width to be extended.
FEATURES
Incremental inputs (A, B)
On-chip phase discrimination circuit (up-count mode
when the phase order is A B, down-count mode
when B A) 4-multiplication count method
On-chip edge detection circuit
8-bit up/down counter latch output o Carry output,
borrow output
Count data output controllable (3-state output)
CMOS, single +5 V power supply
ORDERING INFORMATION
Part Number
µPD4702C
µPD4702G
Package
20-pin plastic DIP
20-pin plastic SOP
(300 mil)
(300 mil)
PIN CONFIGURATION (Top View)
Reset
A
B
NC
CD0
CD1
CD2
CD3
NC
VSS
1
2
3
4
5
6
7
8
9
10
20 VDD
19 Carry
18 Borrow
17 STB
16 OE
15 CD7
14 CD6
13 CD5
12 CD4
11 NC
PIN NAMES
A
2-phase incremental signal inputs
B
Reset : Counter reset input
STB : Latch strobe signal input
OE : Output control signal input
CD0-7 : Count data outputs
Carry : Carry pulse output
Borrow : Borrow pulse output
Document No. IC-3304A (2nd edition)
(O. D. No. IC-5403A)
Date Published April 1997 P
Printed in Japan
© 11999934

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